How to make a data guide?

Question

Angular

Now a service has been written that has one method that returns directories with data:

@Injectable()
export class InteragencyCooperationReferencies {
    public doctypes: ReplaySubject<any> = new ReplaySubject(1);
    public results: ReplaySubject<any> = new ReplaySubject(1);
    public reqtypes: ReplaySubject<any> = new ReplaySubject(1);
    public status: ReplaySubject<any> = new ReplaySubject(1);

    constructor(private interagencyCooperationService: InteragencyCooperationService) {
        this.interagencyCooperationService.catalogsInterdepartInteraction().subscribe((response) => {
            this.doctypes.next(response.doctypes);
            this.results.next(response.results);
            this.reqtypes.next(response.reqtypes);
        });
    }
}

Next, it packages the data by name ReplaySubject . In a place where the directory is necessary - I subscribe to the corresponding variable. How correct is this approach?

There is such a doubt - would it not be better to use AsyncSubject together with ReplaySubject, since directories are loaded once and, accordingly, only the last value needs to be obtained.

Answer 1

It will be right

private response = this.interagencyCooperationService.catalogsInterdepartInteraction()
  .pipe(shareReplay(1));
public doctypes = this.response.pipe(map(r => r.doctypes));
public results = this.response.pipe(map(r => r.results));
public reqtypes = this.response.pipe(map(r => r.reqtypes));

Subjects are not needed, subscription too.